Décrit initialement sous Cyprinodon alvarezi:
ZooBank:3A731526-D9A7-410B-8D7B-A36DD828E77D.
- Miller, Robert Rush. 1976. "Four new pupfishes of the genus Cyprinodon from Mexico, with a key to the C. eximius complex". Bulletin of the Southern California Academy of Sciences. 75(2):68-75 (ffm00172)
Conservation: Cyprinodon alvarezi est évalué par l'Union Internationale pour la Conservation de la Nature dans la Liste Rouge des espèces menacées comme étant (EW) éteint à l'état sauvage (2018). Reported extinct in 1994 by Burkhead (2012). I nevertheless was able to see what apparently were the last specimens in March 1996, when the sprigs had been reduced to a few isolated small poodles.